1 files changed, 48 insertions, 0 deletions
diff --git a/libs/qm-dsp/dsp/tonal/ChangeDetectionFunction.h b/libs/qm-dsp/dsp/tonal/ChangeDetectionFunction.h
new file mode 100644
index 0000000000..3a84b3096f
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+++ b/libs/qm-dsp/dsp/tonal/ChangeDetectionFunction.h
@@ -0,0 +1,48 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    QM DSP Library
+
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2006 Martin Gasser.
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _CHANGEDETECTIONFUNCTION_
+#define _CHANGEDETECTIONFUNCTION_
+
+//#define DEBUG_CHANGE_DETECTION_FUNCTION 1
+
+#include "TCSgram.h"
+
+#include <valarray>
+using std::valarray;
+
+typedef	valarray<double> ChangeDistance;
+
+struct ChangeDFConfig
+{
+	int smoothingWidth;
+};
+
+class ChangeDetectionFunction
+{
+public:
+	ChangeDetectionFunction(ChangeDFConfig);
+	~ChangeDetectionFunction();
+	ChangeDistance process(const TCSGram& rTCSGram);
+private:
+	void setFilterWidth(const int iWidth);
+	
+private:
+	valarray<double> m_vaGaussian;
+	double m_dFilterSigma;
+	int m_iFilterWidth;
+};
+
+#endif // _CHANGDETECTIONFUNCTION_